const Enmap = require('enmap');
const { client, logger, config } = require('..');

const levels = new Enmap({ name: "levels" });
let cooldowns = {}

client.on('message', async message => {
    if (message.author === client.user._id) return;
    try {
        const channel = await client.channels.fetch(message.channel);
        if (channel.channel_type !== "Group") return;
        let groupLevels = levels.get(channel._id);
        if (!groupLevels) groupLevels = {}
        if (!groupLevels[message.author]) groupLevels[message.author] = { xp: 0, level: 0, enabled: true }

        if (groupLevels[message.author].enabled === false) return;

        // Ensure users only get XP once a minute
        if (cooldowns[message.author] > Date.now()) return;
        cooldowns[message.author] = Date.now() + 1000 * 60;

        // Give a random amount of XP between 15 and 25
        groupLevels[message.author].xp += 15 + Math.round(Math.random() * 10);

        let newLevel = 0;
        for (const i of levelups) groupLevels[message.author].xp >= i && newLevel++;

        if (newLevel > groupLevels[message.author].level) {
            client.channels.sendMessage(message.channel, `>GG <@${message.author}>, you just leveled up! New level: **${newLevel}**`)
                .catch(console.error);

            groupLevels[message.author].level = newLevel;
        }

        levels.set(channel._id, groupLevels);
    } catch (e) {
        console.error(e);
    }
});

// How much XP is required to level up
// 30, 63, 99, 139, 183, 231, 284, ...
const levelups = [ 30 ];
while (levelups.length < 250) {
    let i = levelups[levelups.length - 1];
    levelups.push(Math.round(i * (i > 50000 ? 0.02 : (i < 100 ? 1.1 : 1.05))));
}

for (const i in levelups) levelups[i] += levelups[i - 1] || 0;

// Export level DB for access from other modules
module.exports = { levels, levelups };